50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1mm thick aluminium foil.
50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1mm thick aluminium foil. If the potential difference between the target and the filament is increased, the fraction of the X-ray passing through the same foil will be
(a) 0%
(b) < 50%
(c) 50%
(d) > 50%.
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